Product Compare
AMD Radeon RX 640 Mobile vs AMD Radeon R9 285
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | May 2019 | Sep 2014 |
| Generation | Mobility Radeon | Volcanic Islands |
| Type | Mobile | Desktop |
| Bus Interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Base Clock | 1082 MHz | |
| Boost Clock | 1218 MHz | |
| Memory Clock | 1500 MHz | 1375 MHz |
| Memory | ||
| Memory Size | 2GB | 2GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 64bit | 256bit |
| Bandwidth | 48.00GB/s | 176.0GB/s |
| Render Config | ||
| Compute Units | 10 | 28 |
| Shading Units | 640 | 1792 |
| TMUs | 40 | 112 |
| ROPs | 16 | 32 |
| L1 Cache | 16 KB (per CU) | 16 KB (per CU) |
| L2 Cache | 512 KB | 512 KB |
| Theoretical Performance | ||
| Pixel Rate | 19.49 GPixel/s | 29.38 GPixel/s |
| Texture Rate | 48.72 GTexel/s | 102.8 GTexel/s |
| FP16 (half) | 1.559 TFLOPS | 3.290 TFLOPS |
| FP32 (float) | 1.559 TFLOPS | 3.290 TFLOPS |
| FP64 (double) | 97.44 GFLOPS | 205.6 GFLOPS |
| Graphics Processor | ||
| GPU Name | Polaris 23 | Tonga |
| GPU Variant | Polaris 23 XT | Tonga PRO(215-0851128) |
| Architecture | GCN 4.0 | GCN 3.0 |
| Foundry | GlobalFoundries | TSMC |
| Process Size | 14 nm | 28 nm |
| Transistors | 2.2 billion | 5 billion |
| Die Size | 103 mm² | 366 mm² |
| Board Design | ||
| TDP | 50W | 190W |
| Outputs | No outputs | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 |
| Power Connectors | None | 2x 6-pin |
| Suggested PSU | 450 W | |
| Graphics Features | ||
| DirectX | 12 (12_0) | 12 (12_0) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 2.1 |
| Vulkan | 1.2 | 1.2.170 |
| Shader Model | 6.4 | 6.5 |